Diamond



FIG. 1 is a top view of the diamond;

FIG. 2 is a bottom view of the diamond shown in FIG. 1;

FIG. 3 is a left side view of the diamond shown in FIG. 1, the right side view being identical; and,

FIG. 4 is a front view of the diamond shown in FIG. 1, the rear view being identical. 

CLAIM The ornamental design for a diamond, as shown and described. 